Earth Hour, organised by preservation group WWF, is a global event seeking to inspire millions across the world to take action to protect the planet.

Communities across Wales come together to 'help shape a brighter future'

More than 100 landmarks across the UK are switching off their lights to mark this year's Earth Hour.

Cities across world go dark to mark Earth Hour

Famous global landmarks fell dark for 60 minutes to mark Earth Hour, a campaign urging awareness and action on climate change. 

Herefordshire singer Ellie Goulding is urging people to switch off their lights to support the annual Earth Hour campaign. 

Iconic buildings from Big Ben to St Basil's in Moscow and the Sydney Opera House turned out the lights to raise awareness of the environment

The lights on some of the world's most iconic buildings have started going dark as the first countries mark Earth Hour.

Several famous London landmarks lost their illuminations for an hour last night as part of a charity campaign to highlight climate change.

Buckingham Palace, London's Tower Bridge, Old Trafford and Big Ben are taking part in the event to raise awareness about climate change.